package cn.com.csg.smartenergy.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.ThreadPoolExecutor;

@Configuration
public class ThreadPoolTaskConfig {
	
	private static final int corePoolSize = 100;       		// 核心线程数（默认线程数）
	private static final int maxPoolSize = 1000;			    // 最大线程数
	private static final int keepAliveTime = 60;			// 允许线程空闲时间（单位：默认为秒）
	private static final int queueCapacity = 1000;			// 缓冲队列数
	private static final String threadNamePrefix = "Async-"; // 线程池名前缀
	
	@Bean("taskExecutor") // bean的名称，默认为首字母小写的方法名
	public ThreadPoolTaskExecutor taskExecutor(){
		ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
		executor.setCorePoolSize(corePoolSize);   
		executor.setMaxPoolSize(maxPoolSize);
		executor.setQueueCapacity(queueCapacity);
		executor.setKeepAliveSeconds(keepAliveTime);
		executor.setThreadNamePrefix(threadNamePrefix);
		
		// 线程池对拒绝任务的处理策略
		executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
		// 初始化
		executor.initialize();
		return executor;
	}
}